Seamless yellow math paper that you can download for free. This is a math line pattern on a notebook yellow paper texture. You can use this free notebook paper texture as Photoshop pattern.

Seamless notebook paper textures can be used to create any size backgrounds.
This free paper texture can be used in all kind of graphic design projects, school projects, etc. This pattern works great with doodle and scribble Photoshop brushes.

Or you can add some text combined with math formula Photoshop brushes.

Grid texture that you can download for free. This is a seamless grid textures that you can use as grid pattern for your layout designs. If you want to overlay the grid pattern over your image simply set the blend mode to Multiply in Photoshop.

If you need a lined graph paper or a lined math paper, you can download this image. This lined paper has a grid pattern with subdivisions. You can use this grid texture in all kind of graphic design projects.

It can be used as website background. Or, you can use it as Photoshop grid to align objects.
We have other grid textures and grid patterns to choose from.

You can also check out these grid Photoshop brushes and patterns. The pack also contains a grid generator that you can use in Photoshop to create grid patterns.
If you want to add grid to photo online use the MockoFun graphic design tool.